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  • 1
    Electronic Resource
    Electronic Resource
    Genetics of Five Seed Esterase Isozymes in Pearl Millet (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 102 (1989), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Inheritance and linkage relationships of pearl millet seed esterase isozymes were studied using; polyacrylamide dise: gel electrophoresis and α-naphthyl acetate as substrate. The Zone of enzyme activity was resolved into five bands. The presence of a band showed complete dominance over its absence. Each one of the bands (1 to 4) was under the control of a single gene. Band five was found to be controlled by three independent loci with duplicate gent action Loci for Est1, Est3 and Est4 Were found to be linked. Est2 Was independent of this linkage group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1989.tb00326.x
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  • 2
    Electronic Resource
    Electronic Resource
    Nutrients-mediated shift in temporal expression of phytochrome controlled β-amylase synthesis in mustard (Sinapis alba L.) cotyledons (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 8 (1985), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. In cotyledons of mustard (Sinapis alba L.) seedlings grown with distilled water (DW) phytochrome controlled increase in β-amylase (E.C. 3.2.1.2) level takes place at about 42 h after sowing (starting point), while the photoresponse escapes from photoreversibility at 30 h after sowing. The temporal onset of starting point is presumed to be determined by innate process of developmental homeostasis, which is not amenable to influence of environmental factors such as light and nutrients. However, the temporal appearance of onset of phytochrome controlled increase in β-amylase level (starting point) in seedlings grown with Hoagland's nutrient solution (HS) is delayed by 9 h as compared to DW-grown seedlings. Concomitantly, the temporal appearance of the loss of photoreversibility of phytochrome mediated increase in β-amylase level (coupling point) is also delayed by 9 h in HS-grown seedlings. HS does not influence the primary action of phytochrome, the lifetime of components involved in signal chain of above photoresponse and the turnover of β-amylase enzyme. These results indicate that HS-induced temporal shift in onset of starting point of above photoresponse is caused by interaction of nutrients with the process of developmental homeostasis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1985.tb01408.x
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  • 3
    Electronic Resource
    Electronic Resource
    Interchange trisomics in pearl millet (1977)
    Springer
    Cellular and molecular life sciences 33 (1977), S. 1581-1582 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the progeny of interchange heterozygotes ofPennisetum typhoides, 2 interchange trisomic plants were obtained. These were selfed over 2 generations and the cytology of the parents, s1 and s2 plants was studied. The types of multiple associations in the s1 and s2 generations differed from those of the parent. A significant decrease in mean chiasma frequency was noted in s1 and s2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01934009
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  • 4
    Electronic Resource
    Electronic Resource
    Pseudo-isochromosomes in pearl millet (1981)
    Springer
    Cellular and molecular life sciences 37 (1981), S. 137-137 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Meiosis in a plant with 2n=12+2 pseudo-isochromosomes was studied. The pseudo-isochromosomes were compensating for the loss of the 3rd chromosome pair of the normal diploid complement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01963193
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of A1 cytoplasmic substitution on the downy-mildew incidence of pearl millet (1993)
    Springer
    Theoretical and applied genetics 87 (1993), S. 558-560 
    Details
    ISSN: 1432-2242
    Keywords: Pennisetum glaucum, Pearl millet ; Male sterility ; Disease resistance ; A1 cytoplasm ; Downy mildew ; Sclerospora graminicola
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Large-scale cultivation of pearl millet [Pennisetum glaucum (L.) R. Br. F1 hybrids in India has led to increased incidence of downy-mildew (Sclerospora graminicola). There is concern that the A1 male-sterile cytoplasm used in all the hybrids released so far is responsible for this increase. The influence of A1 malesterile cytoplasm on downy-mildew incidence in pearl millet was studied by comparing the disease reaction of 40 pairs of F1 hybrids, each pair carrying respectively a1 male-sterile and normal B cytoplasm. Mean downy-mildew incidence was similar in the hybrids carrying either A1 male-sterile or B cytoplasm. The general combining ability of lines with and without A1 cytoplasm was found to be similar for downy-mildew incidence. These results indicated that in pearl millet A1 cytoplasm is not associated with increased downymildew incidence. The possible danger of using only one source of cytoplasm has been briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221878
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  • 6
    Electronic Resource
    Electronic Resource
    Cytology of inbreds and f 1 hybrids of pearl millet (1972)
    Springer
    Theoretical and applied genetics 42 (1972), S. 69-74 
    Details
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The meiotic behaviour of chromosomes was studied in four inbred lines and their F 1 hybrids of P. typhoides. The inbred lines showed a decrease in mean chiasma frequency when compared with the population plants, but differed from one another in their mean chiasma frequencies. Together with the decrease in mean chiasma frequency the inbreds showed variation in mean chiasma frequencies. The inbred lines showed a number of meiotic abnormalities such as extra chromosomes, extra fragments, desynapsis, persistent nucleoli and differential condensation of chromosomes. The F 1 hybrids of these inbreds exhibited heterosis for chiasma frequency. All the F 1's had mean chiasma frequencies higher than the means of the respective participating parents. The F 1's, however, differed in the degree of heterosis exhibited. In the F 1 hybrids, the variation in mean chiasma frequency, both between plants and between PMC's within plants, was significantly lower than that of the inbred lines. The effect of environment was studied in the inbred lines and their F 1 hybrids. The mean chiasma frequencies of the inbred lines were significantly lower, and the variation in mean chiasma frequencies was greater, in the stress season. The mean chiasma frequencies of F 1's did not show any significant differences between the two seasons. The F 1's exhibited less variation in mean chiasma frequency than the inbred lines, showing that F 1's were developmentally more stable. The F 1's did not show any meiotic abnormalities in either season.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00277946
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  • 7
    Electronic Resource
    Electronic Resource
    Monotelodisomics in pearl millet (1976)
    Springer
    Theoretical and applied genetics 47 (1976), S. 85-86 
    Details
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In the progeny of crosses between plants with the chromosome number 2n=13+2 telocentrics as the male parents and the normal diploids of Pennisetum typhoides S. & H., two plants with 2n=13+1 telocentric chromosome were located. These two plants were heterozygous for an interchange, since at diakinesis and metaphase I associations of four chromosomes were observed. These plants had a chromosome constitution of 2n=13+t (or 6″+tI″); one chromosome of a homologous pair was represented by a telocentric chromosome so was monosomic for one arm, that is, these plants were “monotelodisomics” (Kimber and Sears, 1968).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00281920
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  • 8
    Electronic Resource
    Electronic Resource
    Monofactorial “multiploid sporocytes” condition induced by EMS in Pearl Millet (1971)
    Springer
    Genetica 42 (1971), S. 214-218 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: “Multiploid sporocytes” condition was observed in the M2 generation of Pennisetum typhoides raised from seeds treated with 0.3 percent EMS at pH 7. The pollen mother cells in the anther locules were devoid of individual boundaries and aggregated into plasmodium-like masses of various sizes in which the chromosomes were lying in groups. The number of chromosome pairs in these groups varied from 7 to 42 and in a few cases much larger groups were observed. At diakinesis and metaphase I, trivalents and quadrivalents were observed, which suggested that the chromosomes from different cells were in proximity at an early stage. Apparently cytokinesis was suppressed at the premeiotic divisions. Sometimes groups of chromosomes from several nuclei were together at metaphase I, the bivalents and multivalents co-orienting on a single spindle. Then the spindle was many times wider than normal, but the length was not greatly changed. Anaphase I segregation and second division were irregular. The microspores formed were of variable size. Sterility was high. This condition behaved as one controlled by a single recessive gene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00121903
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  • 9
    Electronic Resource
    Electronic Resource
    The meiotic behaviour of a haploid pearl millet (1971)
    Springer
    Genetica 42 (1971), S. 319-328 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Meiosis was studied in one haploid plant of pearl millet, obtained from twin seedlings. Apparent pairing resulted in up to three bivalent associations at pachytene. At diakinesis and metaphase I associations of two, three or four chromosomes were observed. The frequency distribution of bivalents at metaphase followed a truncated Poisson distribution, suggesting that the bivalents were random pairs. They were considered to be pseudo-bivalents. Univalents varied in number from three to seven and they formed s-s and e-g associations. The s-s and e-s associations were random associations since their frequency distributions also followed a truncated Poisson distribution. A bipolar spindle was observed in a large number of PMC's but in a few cases two unipolar spindles were observed. The anaphase I distribution of the chromosomes deviated from abinomial distribution. Laggards were observed at telophase I. The dyads varied in size and in number of chromosomes. After the second division cell wall formation often failed to take place in one or in both the dyads, resulting in the formation of 2 to 4 microspores and microspores with two nuclei. The pollen grains varied in size and number of chromosomes. The plant was completely sterile.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00123326
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  • 10
    Electronic Resource
    Electronic Resource
    Influence of B-chromosomes on meiosis in pearl millet (1975)
    Springer
    Genetica 45 (1975), S. 237-251 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract B-chromosome behaviour and the effects of B's on the endophenotype were studied in the third back-cross progeny of a cross between non-B and B-carrying parents ofPennisetum typhoides Stapf et Hubb. In the experimental material a regular increase in B-chromosome chiasma frequency and an increase in the variation of mean chiasma frequency with increased number of B's was observed. When four or more B-chromosomes were present quadrivalents occurred more frequently. In these respects the experimental material differed from the B-carrying parent. B's had no effect on the mean chiasma frequency of A-chromosomes when present in numbers of up to and including four but when present in numbers of more than four had a depressing effect. The variation of the mean chiasma frequency of the A-chromosomes increased with increasing number of B's. No correlation was observed between A-chromosome chiasma frequencies and B-chromosome chiasma frequencies. In the experimental material B's when present in larger numbers i.e. more than four had deleterious effects on A-chromosome behaviour and on fertility. In the effects of B's on the endophenotypic characters the experimental material differed from the B-carrying parent. It is suggested that the behaviour and effects of B's on the endophenotypic characters are the result of interaction between the A-chromosome genotype and the B-chromosomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01517200
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